Oxidation with periodate theoretically allows introduction of two aldehydic groups on C2鈥揅3 glycol positions of anhydroglucose units. This reaction not only enhances the flexibility of the cellulosic backbone, but also causes a decrease in the molecular weight. In particular, the rheological behavior...
The remaining 3–4% of D-glucose residues form branch-points by (1ₒ3)-α- D linkages. The periodate-oxidation technique, which has been extensively used by other workers to determine dextran structure, gave erroneous results when applied to the dextran from stale sugar-cane. 展开 ...
In addition, if a series of three hydroxyls occur on neighboring carbons, such as in glucose-containing polymers like dextran, then treatment with periodate would result in the formation of one molecule of formaldehyde (from oxidation and loss of the central carbon atom) and two aldehydes ...
4) periodate oxidation 高碘酸氧化 1. A quantitative method for erythritol was developed by periodate oxidation, which allowed the easy and rapid analysis of erythritol of the fermentation supernatant. 建立了一种比较精确和简便的高碘酸氧化法直接测定发酵液中赤藓糖醇质量浓度的方法 ,通过校正吸光度值...
Fourier-transform 13C nuclear magnetic resonance spectra of D-glucose 3- and 6-sulfates A simple procedure for the determination of glyoxal in dialdehyde fragments, formed from glycosides by periodate oxidation, is proposed. By heating sample solutions prepared by dilution of reaction mixtures for pe...
A new catalytic photometric method for the determination of ruthenium based on its catalytic effect on the oxidation of toluidine blue (TB) by KIO 4 in H 3PO 4 medium was reported. A linear relationship was obtained between the reaction rate and the concentration of Ru(Ⅲ) in the range of...
Fransson L-A (1978) Periodate oxidation of the d-glucuronic acid residues in heparan sulphate and heparin. Carbohydr Res 62: 235 - 244Fransson, L., et al., “Periodate Oxidation of the D-Glucuronic Acid Residues in Heparan Sulphate and Heparin” (1978) Carb. Res., vol. 62:235-244. ;...
In this case it has been possible to estimate by periodate oxidation the proportion of glycol groups in a partially substituted cellulose derivative; it is evident, however, that the method may not be generally applicable. Mixtures of 2 : 3-, 2 :6-, and 3 : 6-dimethylglucoses and 2-,...
Sataraddi, S.R., Nandibewoor, S.T.: Oxidation of D-glucose by Silver (III) periodate complex in the presence of Ru(III)/Os(VIII) as a homogeneous catalyst: a comparative mechanistic study (Stopped flow technique). J. Solution Chem. 42, 897-915 (2013)...
Formaldehyde and formic acid are formed in greater proportions than would be expected from oxidation of the terminal glucose units. The yield of acid is higher in the light than in the dark. For a given degree of oxidation, periodate oxycelluloses prepared in daylight have lower copper numbers...